Ground working trailer



G. B. woon 2,207,424

'v GROUND WORKING TRAILER rilduan. s, 1939 '5 lsham-snm '1 July 9, 1940.

July 9, l1940;

G. B. WOOD GROUND WORKING TRAILER Fild Jan. s, 1939 5 'snee'ts-sheet s @ea/'je Wand? July 9, 1940 2 G. B. woon GROUND WORKING TRAILER Filed'gan. 5, 1939 5 Sheets-.Sheet 4 'nv VENTOR @ea/ge gfx/@az n A A TTORNEYS.

July 9s 1940. v A ;r B WOOD Y 2,207,424

GROUND WORKING TRAILER Filed Jan. 3, 1959 s sheets-sheet 5 EELS 250g/,4Z 290 BY l Mld, ff/'144. A TTORNE Ys.

f-'um'reo STATES i r'Parli-r1f1" (OFFICE g George B. Wood, Detroit, Mich., assiznor t G8!- r.Wood Industries Inc., Detroit, Mich., a corporation of Michigan o f Application January 3, 1939, Serial No. 249,004` 4 clains. (ci. s11zm This invention relates to Aimprovements in receptacle, Fig. 11i-showing the device in dumping scrapers, and particularly relates to Scrapers in position, and Fig. 14 being -a 'fragmentary plan which the scraper blade is associatedwith a dirt view showing thewidth ofthe baille platerelative hauling scoop, arranged within a frame structo the receptacle in whichit is'mounted.

5 ture, which is utilized as a means for transport- Referring to the drawings, and referring par- 5 ing the dirt graded or scraped from a surface. ticularly t0 FiSS- 1 t0 7 theref, the main frame Further, the presentv invention relates to the structurecomprises longitudinal, 4opposite side type of structure disclosed and claimed in the beams lil'and l2 rigidly joined at their forward pending application of Edward R. Barrett, Seria1 ends by a tubular cross beam I4 and joined ad- No. 232,708, led October 1, 1938, in which the ljacent their rear ends by a cross-beam I6 of box 10 scoop means are plvotally connected directly to section. Two sets of paired truck wheels I8 and the mainframe structure and are raised and 20 are mounted on horizontally and transversely lowered by lifting and lowering the forward end aligned-Stub axles 22 and 24, respectively, which of the frame. are 'fixed' to the'rear ends of side beams I0 and one of me primary objects of Vthe present. 1nl2. respectively, to support the rear end of. the l `vention is to provide improved Scrapers of the frame The O'IWaId end 0f the frame iS Suptype mentioned which have substantially greater ported by a connection with a pair of steering capacity than heretofore Y wheels 2'6 mounted'relatively close together on Another object 'of'the'invention is to provide suitable spindles: at opposite ends of a cross axle improved scraper structurs of the typen'ien- 34. A draw bar '36, having rearwardly directed20 tioned in which means are associated with the yoke portionsAs attached to the axle 34 for coninterior of the bowl for distributing the load nection withfa tractor or the like. disposed within the bowl, so that the bowl has The connection between thefmain frame and greater capacitythan prior structures. the axle .34 is similar to that disclosed rin the 25 Other objects of. the invention will become ap- Barrett application above referred to and com- 25 parent from the following speciiication, .the prises a pair of yoke arms 60 integrally secured drawings relating thereto, and from the claims to the upper end of a semi-cylindrical strut memhereinafter ser, foren l ber 6l, a hydraulic cylinder mechanism 64 and In the drawings, in which like numerals are resilient connecting means generally designated used to designate like parts in the several'views lili. The, strut member 6| `is pivotally attached `30 throughout: i y at its lower end by a horizontal pin 68 to a uni- Figure l is 'a side elevational Vjview, with parts versal knuckle 10 which is pivoted on the medial broken away, showing parts in cross section, of part of a pin (not shown) which in turn is disa load-hauling excavating machine embodying posed at right angles to the pin 68 and is features of the present invention; mounted at its ends in rupright spaced arms of a 35 Fig. 2. is a fragmentary top plan view of'tiie fitting which iscentrally disposed lto the axle 34. structure shown in Fig. 1; i; The fitting includes a vertical king pin which is Figs. 3 to 5 are side elevational views illustrating Pivotally mounted to the axle member. centrally the parts in various positions oi adjustment for thereof. y i

40 performing the digging or excavating, and ldump- The arms 60 vare angledvrearwardly from the 40 ing functions of the structure;v f strut 6IV and are pivotally attached by pivot pins `Fig. 6 is an enlarged cross-sectional view'v taken I6 to spacedears 18 on the cross beam I4 and substantially along the line .6--6 of Fig. 5; .o are equally spaced at opposite sides of the median Y Fig. 7 isV a cross-sectional view taken substanlpoint of the beam. thus permitting these arms tially along .the line 1 -1 .of Fig. 6; toy swing in'vertical planes only. 45

Fig. 8 is a view similar to Fig. l illustrating a The hydraulic power mechanism 64 is pivotally modied form of the present invention; and mounted at its lower end on a cross pintl which Figs. 9 to 1l areside elevational views `of the extends through a iitting welded to the lower structure shown in Fig. 8 illustrating theparts end of "post 6I. The power mechanism 64 in in various positions of adjustment for perform- `cludes a piston rody 82 which is pivotally Vat.- 50

ing the digging or excavating anddumping f unctached at its outer upper end by a bolt 84 -toV a tions of the structure. forwardly and upwardly directedextension 86.

Figs. l2, 13 and 14 are-views showing a modi- The extension 86 is rigidly fixed to'the cross fication comprising a baffle plate for guiding the beam I4 substantially at its center. '55 dirt upwardly and rearwardly into the rearmost The resilient connecting. means 66 Ainclude a 55 pair of spring mechanisms or units. one unit dis-` posed at each side of the-forward yextension 06. The spring units, which are both of the same construction, are disclosed and claimed in the copending application of Jack B. Haile, filed August 10, 1938, Serial No. 224,131, and assigned to the assignee of the present invention.

The Haile application may be referred to for a complete description of the resilient connecting means 66, but it is merely necessary for an understanding of the present invention to say that each unit 66 includes a telescoping strut which is pivotally mounted by a pivot pin Y62 tothe.ex`

i tension 86 at its upper end Vand is pivotally' `lili ing or scraping operation.

mounted by a pivotpin- 04 to the forwardly extending end of a bracket 66 which is secured to the strut 6|. Stop means 91, 00, and 60 are fixed to the strut 60 at the top, bottom, and median points, respectively. Coil springs |\0| and |02are mounted in embracing relationship to the tele- Y scopic strut 00 and are Aso disposed that the ends of the spring |0| abut against the stops 91, and 96, and the ends of the spring |02 abut against the stops Bland. The springs |0|and |02 are of such strength and construction that they will support the machine when fully loaded.

By the application of a hydraulic medium' to the mechanism 64, the piston rod02 is extended from its retracted position as shownV in Figs. 3 and 4 to its; extended position asshownV in Fis. 5. The strut 6| is thus swung from a rearwardly inclined position, as shown inFigs. v3 and 4, to a substantially vertical position, as shown in Fig.l 5, to thereby elevaterthe forward end of f the main frame.

The main body portion of the scraper includes a generally box-like scraping and-carrying re-` ceptacle forming a rear section and a forward part. The rear section is in the shape of a bowl |04 having a rear wall, side walls and a floor |06. 'I'he bowl |04 is open at the top and its forward end. The bowl .|04 -is pivotally rnountedjon` op- `positely disposed pivot pins |00, which may be leading edge thereof. The baille member 122' has a substantially smooth upwardly andjrearwardly inclined forward wallportion, anda downwardly and rearwardly sloping rear -wall portionA thus forming a closed ,box section of substantially triangular crossf section. A transversely extending scraper 'blade |24is fixed to the forward leading edge of the baille |22' adjacent the bottom thereof and is designed for the gra'df- The adjustmentof this blade .|24 relative 'to` the groundis effected by the elevating andflow?" ering ofthe main frame by actuationjof'dthe hydraulic mechanism64; and as the dirt passes upwardly over the blade |24, it is caused to pass upwardly over the smooth, rearwardly inclined surface of the baille |22 and be disposed within the 'receptacle to the rear of the baille. A floor member |23 is xcd to the iloor |06 and is also fixed to thetop of the baille member |22 and "ismaterially smaller thanl the angle of the inclined baille |22, so that with the baille |22 the capacity of the receptacle is materially increased.

For closing the opening in thebottom for- 'wardly of the scraper |24, an upwardly swinging gate |54 is provided. This gate is received between the side walls |55 and rearwardly of the front wall |61, which are connected to the frame members il!k and l2 and form the front end of the main body portion of the receptacle. 'I'he gate |54 is pivotally mounted by means of rear- ,v wardlyextending arms |56 at each side thereof,

each-of which is pivotally attached to its adjacent side Wall |55 by means oi a pivot pin |66.

For raising the end gate w|64 by pivoting it about the pins |56, a link |60 is pivotally attached by pivot pin |62 to a bracket |64 xed to the gate member |64 at substantially its transverse center. The link` |60 extends upwardly within the receptacle and is pivotally attached by means of a pivot pin |64 to the lower end of a crank lever |66. The levery |66 is pivoted at |66 tc a bracket |69 which in turn is fixed to the cross member/i4 at 'substantially its midpoint. The rear lower edge of the gate is thus adapted to `swing from and against the blade |24 as the gate |54 is swung about its, pivots |58. l

`For actuating thegate between open and closed l positions, there isprovided al hydraulic cylinder |10 which is pivotally mounted at its forward end by a pivot pin |12 to the forward end of the extension 06. 'I'he cylinder |10` has the usual piston` rod |14 extending rearwardly therefrom which is pivotally attached at |16 to a bracket |10, which in turn is fixed to the lever |66. Upon retraction of the piston rod |14, the lever |66 is pulled upwardly about its pivotj |60V and thus raises the link |60 `upwardly and causes the gate 64 Yto move to its open position by pivoting about the pivot pins |50.

The bowl |04 is relatively long, and'it will be evident that during the scraping operation the Vtendency will ,befforthe dirt to pile up adjacent `the front of the vbowl or immediately behind the baille |22. In orde that the dirt which piles up behind the baille |22 may be distributed within the bowl |04 so that the capacity of the bowl is f materially increased, according to the present invention, a pivotally mounted floor member |00 is disposed within the bowl |04 and extends transversely thereof forming a load-supporting surface. The plate member |00 is curved as indicated at |62 adjacent the rear end thereof, and its rear edge is pivotally connected to a transversely extending pivot pin |84. The member |00 overlies theufioor'member .|23 when it is in its lower position and extends over the topof the baiiie'l22. i

When thejelements of the scraper are in scraping position, as shown in Fig. 3, the member |00 is in its lower position and as the dirt passes up over the baille, it is deposited onto the top surface. oi' the member |60. `When the dirt which is deposited on the memberV has reached a maximum, means are provided for lifting the member |80 about the pivot pin |04 which serves 2,207,424 to lift and deposit the dirt in the rear end of r the bowl |04. Such lifting means is provided at each side of the bowl, and each of such means includes a hydraulic cylinder |86 which is pivotally mounted by a pivot pin |88 to an upstanding bracket |90 bowl |04. The hydraulic cylinder |86 hasa forwardly extending piston rod |92 which is pivotally connected by a pivot pin |94 at the front end thereof to a slide |96. Each slide |96 is adapted to slideably engage a trackway |91 formed along the longitudinal top edge of side walls |55 and is adapted toslide therealong-as the piston rod |92 is extended and retracted.

A flexible cable |98 is connected at one end to a pin 200, which is fixed to the piston rod |92 for movement therewith. tends over a pulley 202 which is pivotally mounted to the cylinder |86, and then extends forwardly and is connected at 204 to the plate member |80 at midpoints between the front and rear edges thereof.

As the piston rods |92 are moved from the position indicated in Fig. 3 to the position shown in Fig. .4, the cables |98 are pulled forwardly so that the member |80 is raised from the position shown in Fig. 3 to the position shown in Fig. 4. Any dirt supported on the member |80, when in the position shown in Fig. 3, will thus bedeposited in the rear of the bowl |04. The scraping operation may then continue so that the dirt is deposited on of the member |80, in its upward position. When in its vupward position, the curved portion v|02 adjacent the base assists in the distribution of the dirt forwardly of the member |80 so that the capacity of this portion is also increased.

When the piston rod |92 4has been moved to its forwardmost position, as shownin Fig. 4, a latching mechanism is provided forlatching the slide |96 and holding the slide in this position so that the member |80 is retained in its upright part of the means mounted on the l0. The vbell to engage the outer edge of the finger206 and urge the linger inwardly to its latching position when the lever .2|2 is drawn forwardly. Hand.

operating means are providedfor actuating the bell crank 2|2 which include a rod member 220 pivotally connected by pivot pins 222 to the forward end of the bell crank lever 2|2. Each rod 220 extendsforwardly of the vehicle and is pivotally connected to the lower end of a lever 224. Each lever 224 is fixedly secured to a pivot rod 225 which extends transversely of the scraper and is pivotally mounted adjacent the sides thereof to upstanding brackets 226 to the side frames I0 and I2. l

Another leverv 228 is'fixedly connected to the shaft 225 intermediate its ends and has pivotally secured to the top edge of the The cable |90 exthe floor member |23 forwardly.

' bowl 25o about which may be fixed 'connected to the lower pin 230, aforwardly extending operating rod 232. The operating rod 232 may be extended to a suitably convenient location so that Vit may be operatedk by the vehicle operator to move` the fingers 206 to latching or non-latching positions.

The hydraulic means |86 also serves totilt .the

end thereof, by a pivot bowl |04 to the .position shownin Fig. 5, so that the contents thereof may be dumped. As meritioned above', when the piston rods |92 are .extended to the position shown in Fig. 4, the slides |96 are moved forwardly Vso that, the fingers 206 may be placed in the latching position, as shown in Fig. 6. rlhe floor member |80'is then in its raised position as shown in Figa. When it is desired to dump the contents of the bowl |04, the cylinder IBG-may be so actuatedthat fluid under pressure is forced into the cylinder at the forward end of the cylinder so that the piston 'rod |92 is retracted. As the latches 206 .are`in engagement with the slides |96, the forward .ends of the piston rods |92 are fixed relative to the frame and retractionof `the pistonrods withinv the cylinders wiuresuit in tilting the bowl to the position shown in Fig. 5. VAt the same time, the cable |98 will permit the plate member |80 to drop by gravity so that all of the contents of the bowl may. dumped therefrom. At the i same time", the forward end of `the extensionv 86- is raised andthe piston rod |14 is retracted to raise the gate |54.

In Figs. 8 to 1l, a modified form of structure is illustrated in` which the scraper is of the same type as that disclosed above but in which the mainbody portion of the scraper inf cludes an intermediate section, a rear section, and aforward part in whichtheintermediate and rear sections may andtilted relative to each other. The intermediate section includes side wall members 2,40' and 242 connected together by a bottom member 244. Thissection is open at 'its top, front, and

rear, and is pivotally swung between the frame' |2l on pivot pins 246. The baffle |22 and scraping element |24 aremounted along the leading ledge of the bottom 244 in the same manner asdescribed above.y l

members |0 and vThe front section of the main Abody portion is.`

formed bythe side walls |55, front wall with the gate way as inthe embodiment described above. e The rear section of the receptacle is in the form of a bowl A,250, which is generally of the same shape as the bowl |04 above described lbut which is substantially shorter. pended. within the rearward part of the main frame on pivot pins 252 which may be fixed `to the frame members |0 extending stop 254 may be fixed to the Arear wail of the bowl 250 and is adapted to abut against the top surface ofthe transverse frame member I6, so as to limit the downward movement of the its pivot. T he rear edges of the intermediate'section, that is, the rear edges of the sidewalls 240 and 242 generally both be separated Vfrom' |54 mounted therein in .the same;

The bowl 4250 is sus-- and |2. A transverselyv and the rearedge of bottom wallf244 overlie the front edges of the bowl 250.

The scrapingis accomplished by the scraping element |24 when the partsl are in the position shown inFigs. 9 and 10so that the scraper blade the receptacle, a

as in the embodiment described above. The mov# able member is in the form of a transversely extending plate member i||, similar to that described above, which is pivotally mounted on a transversely extending pivot pin pin |84 is received within the side walls 24| and 242 adjacent the floor 2, so that the member may be pivoted relative tothe door of the` intermediate section.

The member m is lifted Yfrom' the position' shown in Fig. 9 to that shown in Pig. 10 by man! mechanism 'throughof a hydraulically operated connecting linkage member Inder 260 is disposed on each mediate section and may be to the sidewalls 24| and 242, respectively, by

."A hydraulic cylside ot the interoi' a bell crank lever.

otally connected by a pivot pin 21| to its Impective side wall 24| or 212, and the other arm 212 oi the bell crank lever extends downwardly within the receptacle along its side forl pivotal connection to one end oi' a connecting.linkj'il` The lower end of the connecting link 21| may -pivotpin II'Mf; v, l to a bracket 21| which may be nxedly Y be pivotally connected th'rough'a In order to tilt the intermediate and rear sec-l tions of the receptacle to the dumping position shown in Fig. 11, a hydraulically operated cylinder 280 is ture] Each mounted by 4the bowl 250 hydraulic cylinder may be pivotally a pivot pin V282 to the side-Walibi' and has the usual piston rod 2 associated therewith which may be pivotally conf f nected at its forward end tothe side walls 24| and 242, respectively'adjacent the front edges thereof and near the top. Alinkage member 290 is pivotally connected by a pivot pin 282 to an integral upward extension 28| on each of the side walls 240 and N2. 'I'he link 29| is pivotally connected at its rear end through a lost motion connection by `a pivot pin 29| to an upstanding bracket 298 which may be secured to the top edge of the bowl 250 adjacent the rear thereof on each side of the bowl.

When the pistorr rod 2 is extended, the intermedzate section is tilted about its pivot pin 246 and when so tilted, the link members!" tilt the bowl 25| about its pivot pins 2 52 sothat the contents of the receptacle may be dum In Figs. 12, 13 and 14 is shown an improved Vmeans for guiding material entering the torwardmost receptacle, upwardly and rearwardly into the rearmost receptacle 25d, and comprises a downwardly and forwardly inclined baille plate 200 which is welded or otherwise rigidly secured along its upper edge to a horizontally disposed bar or rod 302, the opposite ends of which are journaled in sockets 30| and 30| which are mounted on the inner sides of the upstanding side walls 240 and 242. The baille plate 300 is freely swingable on its mountings and the lower The pivot `Plbdffthel'eifl. It il!` Well "it .isdimcult for earth, particularly certain kinds. fglamef-l'material, wher slide easily over a smooth polished wmuionnebme pivtally connected b r rd o ent y can m nm TheI bulk oi'thematerial disposed at each side of the struc-` forwardl edgethereot rests on the bottom 2 o! the receptacle in which it is mounted, rearwardly ot the cutting blade III,` so that material entering the receptacle over the cutting blade at the middle partof the receptacle is guided upwardly and rearwardly so as to tall by gravity into the rearmost receptacle, asshown in Mg. 12 of the Inffthisway the `rear receptacle 2l may be morefully and easily loaded than where the dirt l ori other material entering the front receptacle is caused to-'passfover a quantity oi' dirt already known in the art that over an already deposited pile oi the the same character ot may be pivotallyconnectedby-means oiillpivotll` pin 266 through an elongated slot in an arm2||- The bell crank lever is pivvIt is to be noted that the plate!" ismaterially less than the width oi' whichitismountedsoasto provide spaces SII and III at each side of the baille plate into which dirt may pass and fill up the f orwardmost receptacle, as well as pile in underneath and behind the balie plate.

oi' dumping the baile plate. being into'position. as shown in Fig, 13 of the drawings. which has been guided by the bamepiateupwardly and rearwardly into the receptaclelll is, ot course, emptied directly from thatreoeptaclef In using-a tree s wingable baille plate of the character disclosed. it is, ot course, unnecessary to provide any hydraulic ram or other operating means for actuating the baille, thus materially simplifying and reducing the cost oi' the structure Formal changes may be made in the speelde embodiments of the invention described without departing from the spirit and substance of the invention, the scope of which is comm with the appended claims.

' What is claimed-is: l. A scraper structure including a main body portion'of box-like form providing a transporting receptacle, a scraper element transversely atceptacle over the door thereof and adjacent said element forming a load supporting surface, means pivotally mounting said member to said receptacle adjacent the rear of said member, means connected to aid member to pivot said member from a position overlying said door to an upright po porting receptacle pivotally attached to said sition, and means associated with said last named means to latch said member in its upright position.

3. A scrape structurecomprising means forming a transporting receptacle, said means including a body portion, a bowl pivotally mounted relative to the body portion at the rear thereof and a swinging gate pivotally mounted relative to the body portion adjacent the front thereof, a. transversely extending scraper element fixed to said body portion along the leading lower edge thereof, a me, ber disposed within said body portion over the oor thereof and adjacent said element forming a load supporting surface, means pivotally connecting said member to said body portion adjacent the rear of said member, and means for pivoting said member about said last named means to shift the load from withinthe main body portion into the bowl.

4. A scraper structure including a. frame, a.

body portion of box-like form providing a transframe, a scraper element transversely attached to the lower leading edge of said body portion, a. member disposed within said receptacle over the floor thereof and `adjacent said element forming a load-supporting surface, means pivotally mounting said member to said receptacle cent the rear of said member, means connected to said member to pivot said member from a position overlying said door to an upright position. said last-named means including a power cylinder having the rear end thereof attached to said forwardly extending reciprocating piston associated with said cylinder, means pivotally and slidably connecting the forward end of said piston relative to said frame, :means providing a flexible connection between said reciprocating piston and saidy member, and means to latch said reciprocating piston in its forward position. Y

GEORGE B. WOOD. 

